The invention relates to a turning and grinding composite processing technology and a special tool of a high-precision micro-crystalline glass motor stator. The tool comprises a fixing seat, a connecting ring, a radial alignment plate, an accessory positioning tool and a pressing cover. The design idea of ingenious. The turning and grinding composite processing technology is introduced and the special tool is designed, machining difficulty of an inner hole of the high-precision micro-crystalline glass motor stator. Working efficiency is improved, the product quality is guaranteed, reliance onequipment is reduced, and popularization value is achieved.